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Home//Municipal//Products//Airport Castings//Manhole Frames & Grates
Airport Castings: Manhole Frames & Grates
Neenah Foundry offers a variety of cast iron manhole frames and grates for the airport market. Select from the list below to find the airport manhole frames and grates that fit your needs.
R-3491 Series
Airport Catch Basin Frame, Grate
| Catalog No. Solid Lid |
Catalog No. Open Grate |
A | B | C | E | F | G | H | J | K |
|---|---|---|---|---|---|---|---|---|---|---|
| R-3491-AL | R-3491-AG* | 21 | 2-1/2 | 18 | 27-1/2 | 5 | 1-1/4 | 1 | 2-7/8 | 1 |
| R-3491-GL* | R-3491-GG* | 21 | 2-1/2 | 24 | 33-1/2 | 5 | 1-1/2 | 1 | 2-7/8 | 1 |
| R-3491-HL | R-3491-HG | 29 | 1-3/4 | 27 | 35 | 6 | 1-1/2 | 1 | 2-7/8 | 1 |
| R-3491-JL | R-3491-JG | 32-3/8 | 2 | 30 | 39-1/2 | 6 | 1-1/2 | 1 | 2-7/8 | 1 |
| Frames in gray iron, grates/covers
in ductile unless noted otherwise. * Gray iron grate/cover. |
||||||||||
- For slab manhole construction
| Catalog Number | Grate Type | Square Feet Open | Weir Perimeter Lineal Feet |
|---|---|---|---|
| R-3491-AG | G | 0.9 | 5.5 |
| R-3491-GG | G | 1.6 | 7.1 |
| R-3491-HG | G | 1.9 | 7.6 |
| R-3491-JG | G | 2.4 | 8.5 |
R-3492 Series
Airport Manhole Frame, Lid
| Catalog Number | Grate Type | Square Feet Open | Weir Perimeter Lineal Feet |
|---|---|---|---|
| R-3492-1 | G | 1.6 | 7.1 |
| R-3492-A1 | G | 2.4 | 8.5 |
| Catalog No. Solid Lid |
Catalog No. Open Grate |
A | AA | B | C | E | F | G | H | Lid/Grate Material |
|---|---|---|---|---|---|---|---|---|---|---|
| R-3492 | R-3492-1 | 27 | 33-1/2 | 2-1/2 | 24 | 36 | 9 | 1-1/2 | 1 | Gray Iron |
| R-3492-A | R-3492-A1 | 32-3/8 | 39-1/2 | 2 | 30 | 42 | 9 | 1-1/2 | 1 | Ductile Iron |
- For slab and built-up manhole construction
- Top and bottom Flange provide complete anchorage so frame becomes an integral part of the slab. Can be gasket sealed for watertight application if specified.
R-3492-BG
Airport Manhole Frame, Ductile Iron Grate
| Catalog Number | Grate Type | Square Feet Open | Weir Perimeter Lineal Feet |
|---|---|---|---|
| R-3492-BG | G | 2.6 | 9.9 |
- For slab manhole construction.
R-3492-CG
Airport Manhole Frame, Ductile Iron Grate
| Catalog Number | Grate Type | Square Feet Open | Weir Perimeter Lineal Feet |
|---|---|---|---|
| R-3492-CG | G | 2.6 | 9.9 |
- For built-up manhole construction
- Available with square base flange, see R-1795M.
R-3493-C
Airport Manhole Frame, Ductile Iron Grate
| Catalog Number | Grate Type | Square Feet Open | Weir Perimeter Lineal Feet |
|---|---|---|---|
| R-3493-C | G | 0.6 | 6.2 |
- For built-up manhole construction
- Frame ring consists of 6 equally spaced lugs.
All dimensions are listed in inches unless otherwise noted.
To order Neenah Foundry products, please call 800.558.5075.
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